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/* $Id: sems-win.cpp $ */
/** @file
* IPRT - Semaphores, implementation for Windows host platform.
*/
/*
* Copyright (C) 2006-2007 Sun Microsystems, Inc.
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 USA or visit http://www.sun.com if you need
* additional information or have any questions.
*/
/*******************************************************************************
* Header Files *
*******************************************************************************/
#define LOG_GROUP RTLOGGROUP_SEMAPHORE
#include <Windows.h>
#include <iprt/semaphore.h>
#include <iprt/thread.h>
#include <iprt/assert.h>
#include <iprt/err.h>
#include "internal/strict.h"
/*******************************************************************************
* Defined Constants And Macros *
*******************************************************************************/
/** Converts semaphore to win32 handle. */
#define SEM2HND(Sem) ((HANDLE)(uintptr_t)Sem)
RTDECL(int) RTSemEventCreate(PRTSEMEVENT pEventSem)
{
/*
* Create the semaphore.
* (Auto reset, not signaled, private event object.)
*/
HANDLE hev = CreateEvent(NULL, FALSE, FALSE, NULL);
if (hev)
{
*pEventSem = (RTSEMEVENT)(void *)hev;
Assert(*pEventSem != NIL_RTSEMEVENT);
return VINF_SUCCESS;
}
return RTErrConvertFromWin32(GetLastError());
}
RTDECL(int) RTSemEventDestroy(RTSEMEVENT EventSem)
{
if (EventSem == NIL_RTSEMEVENT) /* don't bitch */
return VERR_INVALID_HANDLE;
/*
* Close semaphore handle.
*/
if (CloseHandle(SEM2HND(EventSem)))
return VINF_SUCCESS;
AssertMsgFailed(("Destroy EventSem %p failed, lasterr=%d\n", EventSem, GetLastError()));
return RTErrConvertFromWin32(GetLastError());
}
RTDECL(int) RTSemEventWaitNoResume(RTSEMEVENT EventSem, unsigned cMillies)
{
/*
* Wait for condition.
*/
int rc = WaitForSingleObjectEx(SEM2HND(EventSem), cMillies == RT_INDEFINITE_WAIT ? INFINITE : cMillies, TRUE);
switch (rc)
{
case WAIT_OBJECT_0: return VINF_SUCCESS;
case WAIT_TIMEOUT: return VERR_TIMEOUT;
case WAIT_IO_COMPLETION: return VERR_INTERRUPTED;
case WAIT_ABANDONED: return VERR_SEM_OWNER_DIED;
default:
{
AssertMsgFailed(("Wait on EventSem %p failed, rc=%d lasterr=%d\n", EventSem, rc, GetLastError()));
int rc2 = RTErrConvertFromWin32(GetLastError());
if (rc2)
return rc2;
AssertMsgFailed(("WaitForSingleObject(event) -> rc=%d while converted lasterr=%d\n", rc, rc2));
return VERR_INTERNAL_ERROR;
}
}
}
RTDECL(int) RTSemEventSignal(RTSEMEVENT EventSem)
{
/*
* Signal the object.
*/
if (SetEvent(SEM2HND(EventSem)))
return VINF_SUCCESS;
AssertMsgFailed(("Signaling EventSem %p failed, lasterr=%d\n", EventSem, GetLastError()));
return RTErrConvertFromWin32(GetLastError());
}
RTDECL(int) RTSemEventMultiCreate(PRTSEMEVENTMULTI pEventMultiSem)
{
/*
* Create the semaphore.
* (Manual reset, not signaled, private event object.)
*/
HANDLE hev = CreateEvent(NULL, TRUE, FALSE, NULL);
if (hev)
{
*pEventMultiSem = (RTSEMEVENTMULTI)(void *)hev;
return VINF_SUCCESS;
}
return RTErrConvertFromWin32(GetLastError());
}
RTDECL(int) RTSemEventMultiDestroy(RTSEMEVENTMULTI EventMultiSem)
{
/*
* Close semaphore handle.
*/
if (CloseHandle(SEM2HND(EventMultiSem)))
return VINF_SUCCESS;
AssertMsgFailed(("Destroy EventMultiSem %p failed, lasterr=%d\n", EventMultiSem, GetLastError()));
return RTErrConvertFromWin32(GetLastError());
}
RTDECL(int) RTSemEventMultiSignal(RTSEMEVENTMULTI EventMultiSem)
{
/*
* Signal the object.
*/
if (SetEvent(SEM2HND(EventMultiSem)))
return VINF_SUCCESS;
AssertMsgFailed(("Signaling EventMultiSem %p failed, lasterr=%d\n", EventMultiSem, GetLastError()));
return RTErrConvertFromWin32(GetLastError());
}
RTDECL(int) RTSemEventMultiReset(RTSEMEVENTMULTI EventMultiSem)
{
/*
* Reset the object.
*/
if (ResetEvent(SEM2HND(EventMultiSem)))
return VINF_SUCCESS;
AssertMsgFailed(("Resetting EventMultiSem %p failed, lasterr=%d\n", EventMultiSem, GetLastError()));
return RTErrConvertFromWin32(GetLastError());
}
RTDECL(int) RTSemEventMultiWaitNoResume(RTSEMEVENTMULTI EventMultiSem, unsigned cMillies)
{
/*
* Wait for condition.
*/
int rc = WaitForSingleObjectEx(SEM2HND(EventMultiSem), cMillies == RT_INDEFINITE_WAIT ? INFINITE : cMillies, TRUE);
switch (rc)
{
case WAIT_OBJECT_0: return VINF_SUCCESS;
case WAIT_TIMEOUT: return VERR_TIMEOUT;
case WAIT_IO_COMPLETION: return VERR_INTERRUPTED;
case WAIT_ABANDONED: return VERR_SEM_OWNER_DIED;
default:
{
AssertMsgFailed(("Wait on EventMultiSem %p failed, rc=%d lasterr=%d\n", EventMultiSem, rc, GetLastError()));
int rc2 = RTErrConvertFromWin32(GetLastError());
if (rc2)
return rc2;
AssertMsgFailed(("WaitForSingleObject(event) -> rc=%d while converted lasterr=%d\n", rc, rc2));
return VERR_INTERNAL_ERROR;
}
}
}
RTDECL(int) RTSemMutexCreate(PRTSEMMUTEX pMutexSem)
{
/*
* Create the semaphore.
*/
HANDLE hmtx = CreateMutex(NULL, FALSE, NULL);
if (hmtx)
{
*pMutexSem = (RTSEMMUTEX)(void *)hmtx;
return VINF_SUCCESS;
}
return RTErrConvertFromWin32(GetLastError());
}
RTDECL(int) RTSemMutexDestroy(RTSEMMUTEX MutexSem)
{
/*
* Close semaphore handle.
*/
if (CloseHandle(SEM2HND(MutexSem)))
return VINF_SUCCESS;
AssertMsgFailed(("Destroy MutexSem %p failed, lasterr=%d\n", MutexSem, GetLastError()));
return RTErrConvertFromWin32(GetLastError());
}
RTDECL(int) RTSemMutexRequestNoResume(RTSEMMUTEX MutexSem, unsigned cMillies)
{
/*
* Lock mutex semaphore.
*/
int rc = WaitForSingleObjectEx(SEM2HND(MutexSem), cMillies == RT_INDEFINITE_WAIT ? INFINITE : cMillies, TRUE);
switch (rc)
{
case WAIT_OBJECT_0:
{
#ifdef RTSEMMUTEX_STRICT
RTTHREAD Thread = RTThreadSelf();
if (Thread != NIL_RTTHREAD)
RTThreadWriteLockInc(Thread);
#endif
return VINF_SUCCESS;
}
case WAIT_TIMEOUT: return VERR_TIMEOUT;
case WAIT_IO_COMPLETION: return VERR_INTERRUPTED;
case WAIT_ABANDONED: return VERR_SEM_OWNER_DIED;
default:
{
AssertMsgFailed(("Wait on MutexSem %p failed, rc=%d lasterr=%d\n", MutexSem, rc, GetLastError()));
int rc2 = RTErrConvertFromWin32(GetLastError());
if (rc2 != 0)
return rc2;
AssertMsgFailed(("WaitForSingleObject(event) -> rc=%d while converted lasterr=%d\n", rc, rc2));
return VERR_INTERNAL_ERROR;
}
}
}
RTDECL(int) RTSemMutexRelease(RTSEMMUTEX MutexSem)
{
/*
* Unlock mutex semaphore.
*/
#ifdef RTSEMMUTEX_STRICT
RTTHREAD Thread = RTThreadSelf();
if (Thread != NIL_RTTHREAD)
RTThreadWriteLockDec(Thread);
#endif
if (ReleaseMutex(SEM2HND(MutexSem)))
return VINF_SUCCESS;
#ifdef RTSEMMUTEX_STRICT
if (Thread != NIL_RTTHREAD)
RTThreadWriteLockInc(Thread);
#endif
AssertMsgFailed(("Release MutexSem %p failed, lasterr=%d\n", MutexSem, GetLastError()));
return RTErrConvertFromWin32(GetLastError());
}
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